AT43USB325E-AC Atmel, AT43USB325E-AC Datasheet - Page 87
AT43USB325E-AC
Manufacturer Part Number
AT43USB325E-AC
Description
IC USB KEYBOARD CTRLR HUB 64LQFP
Manufacturer
Atmel
Series
AVR®r
Datasheet
1.AT43USB325E-AC.pdf
(109 pages)
Specifications of AT43USB325E-AC
Applications
Keyboard Controller
Core Processor
AVR
Program Memory Type
SRAM (16 kB)
Controller Series
AT43USB
Ram Size
512 x 8
Interface
SPI, 3-Wire Serial
Number Of I /o
42
Voltage - Supply
4.4 V ~ 5.25 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
64-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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8.4.4.2
3355C–USB–4/05
Overcurrent Detect Register – UOVCER
• Bit 2 – PSSTAT: Port Suspend Status
0 = Port not suspended
1 = Port suspended
Set and cleared by the hardware as controlled through Port Control Register.
• Bit 1 – PESTAT: Port Enable Status
0 = Port is disabled
1 = Port is enabled
Set and cleared by the hardware as controlled through Port Control register.
• Bit 0 – PCSTAT: Port Connect Status
0 = No device on this port
1 = Device present on this port
Set to 1 for Port 1. Set and cleared by the hardware after sampling of connect status at EOF2.
• Bit 7..3 – Reserved
These bits are reserved in the AT43USB325 and will read as zero.
• Bit 2 – OVC 2
Setting this bit enables the hub to detect an overcurrent on a port while the hub is in the suspend
state. The overcurrent condition is signalled by a 1 to 0 transition at PD0.
• Bit 1, 0 – Reserved
These bits are reserved in the AT43USB325 and will read as zero.
Initial Value
Read/Write
$1FF2
Bit
R
7
–
0
R
6
–
0
R
5
–
0
R
4
–
0
R
3
–
0
OVC2
R/W
2
0
AT43USB325
R
1
–
0
R
0
–
0
UOVCER
87
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